FRN-R-60
60A 250V Class RK5 time-delay fuse for larger motor circuit protection with excellent starting characteristics.
Product Overview
Description
The FRN-R-60 is a dual-element time-delay fuse designed for larger motor circuit protection.
With 250V rating and 60A current capacity, this fuse handles larger motor starting currents without nuisance opening.
The RK5 design provides excellent protection with superior time-delay characteristics for motors up to 15HP.
Product Series
FRN
Primary Application
Large motor circuit protection
Key Features
- 250V rating for motor circuits
- Dual-element time-delay design
- Handles large motor starting currents
- Excellent for motors up to 15HP
- UL Listed and CSA Certified
- Economical motor protection
Specifications
| Voltage Rating | 250V AC |
|---|---|
| Current Rating | 60A |
| Breaking Capacity | 10kA AC |
| Class | RK5 |
| Time-Current | Dual-element time-delay |
| Size | Standard RK size |
| Standards | UL 248-12, CSA C22.2 |
Applications
Large motor circuit protection
Motor drive and control systems
Combination motor feeders
Motor drive and control systems
Motor disconnect switches
Motor drive and control systems
Industrial motors 10-15HP
Motor drive and control systems
Pumps and compressors
Electronic system design
HVAC motors
Motor drive and control systems
FAE Expert Insights
"The FRN-R-60 is my standard recommendation for 10-15HP motor protection at 230V. The dual-element design handles the high inrush currents of larger motors beautifully - typically 500-600% of rated current for 10-20 seconds without opening. This is essential for across-the-line starting of larger motors. For 15HP motors at 230V with FLA around 42A, sizing at 60A (about 140% of FLA) provides excellent protection while allowing reliable starting. The RK5 class offers economical protection while still providing adequate current limitation. I've specified these fuses for countless motor applications with excellent reliability. Always verify motor FLA from the nameplate and size accordingly."
Reliable protection for larger motors up to 15HP with excellent time-delay characteristics
— Michael Wang, BeiLuo
Frequently Asked Questions
What size motor can FRN-R-60 protect?
The FRN-R-60 is suitable for motors up to approximately 15HP at 230V or 30HP at 460V. For a 15HP motor at 230V with FLA of 42A, the 60A fuse provides protection at about 140% of FLA, which is within NEC guidelines.
Size at 125-175% of motor FLA. FRN-R-60 is ideal for 10-15HP motors at 230V.
How long can FRN-R-60 withstand motor starting current?
The dual-element design allows the FRN-R-60 to withstand 500-600% of rated current (300-360A) for 10-20 seconds. This accommodates typical motor starting periods without nuisance opening. For detailed specifications and application support on bussmann FRN-R-60, refer to the datasheet or contact our team.
Verify motor starting time is within fuse time-delay capability using time-current curves.
What is the difference between FRN-R-30 and FRN-R-60?
The FRN-R-30 is rated for 30A continuous current, suitable for motors up to 7.5HP at 230V. The FRN-R-60 handles 60A for larger motors up to 15HP at 230V. Both have the same 250V rating and RK5 time-delay characteristics.
Select based on motor FLA. FRN-R-30 for smaller motors, FRN-R-60 for larger motors.
Can FRN-R-60 be used for 480V systems?
No, the FRN-R-60 is rated for 250V AC. For 480V systems, use FRN-R-60 fuses with 600V rating (FRS-R series) or Class J fuses rated for 600V. For detailed specifications and application support on bussmann FRN-R-60, refer to the datasheet or contact our team.
Verify voltage rating matches your system. Use 600V rated fuses for 480V systems.
How do I coordinate FRN-R-60 with motor starter overloads?
The fuse provides short-circuit protection while the motor starter overloads provide running overload protection. Size the fuse at 125-175% of FLA and set overloads at 115-125% of FLA. This provides coordinated protection where overloads handle minor overloads and fuses handle major faults.
Coordinate fuse sizing with overload settings for comprehensive motor protection.